Bearing-box



(No Model.)

G. ST. PIERRE.

BEARING BOX.

Patented Mar. 17,1891.

INVEJVTO nirrnn starts PATENT @rrrcn.

GEORGE ST. PIERRE, OF OAKLAND, CALIFORNIA.

BEARING=BO L SPECIFICATION forming part of LettersPatent No. 448,4;62, dated March 17, 1891.

Application filed June 24: 1890. Serial No. 356,563. (No model.)

To all whmn it may concern.-

Be it known that I, GEORGE Sr. PIERRE, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Bearing-Boxes and I do hereby declare the following to be a full, clear, and

exact description ofsaid invention, reference being had to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to new and useful improvements in bearing-boxesand devices for feeding a lubricant to the bearings.

The object of the invention is to provide an oscillating bearing-box for the journals of constantly-rotating shafts-such as are found in the channels of cable railways carrying the sheave on which the cable runs-and also combining therewith a self-feeding oil-cup of the type known as liquefiers, by which the bearing is automatically supplied with oil. By such provisions the Wearing and heating of the bearing, looseness of play of shafts, and other objectionable consequences incident to the operation of these parts are provided against to such an extent as to form a perfectly-operating bearing at all times.

The invention consists in combined oilcup and bearing-boxes having trunnions, and in mounting the boxes upon said trunnions in brackets provided with recesses or slots for the reception of the trunnions, by which mounting they are permitted to oscillate in the direction of the shafts length and to accommodate themselves tothe journals, thus insuring perfect bearing-surfaces within the bearing-boxes and at all times a uniform hearing, notwithstanding the play or shifting of the shaft; and certain novel features in the arrangement and construction of the boxes, by means of which the bearings can be easily removed and new ones inserted, and a discharge provided for the lubricant after it has been used, all as hereinafter explained.

In the accompanying drawings, Figure 1 is a front elevation of a cable-carrying sheave, and the shaft on which it is secured is mounted in my combined bearingboxes and oil-cups, the left-hand. bcaringbox and the cable-carplied to the journals of the shafts carrying the cable-sheave.

Referring to the illustration, A indicates the cable-carryin g sheave secured to the shaft ll, the journals C of said shaft finding their bearings in the bearing-boxes D, which are permitted to oscillate in the direction of the shaft. These combined oil-cups and bearing boxes E have the trunnions a a cast thereon, by which the combined oil-cups and bearingboxes are supported in the brackets F, and the oil-cups G, which are preferably made integral wit-h the bearing-boxes, are formed with a central opening 6, which communicates with the opening (Z in the bearing-boxes for the reception of the shafts. Into these central openin gs are inserted the copper pins 6, which are free to rest on the journal of the shaft, and which by becoming heated by the .friction produced by their contact with the revolving j ournal melt the thick lubricant faround them, which feeds through to the bearings. The vibration of the pins e, owing to the motion of the shaft, also assists materially in feeding the lubricant. The cups G are fitted with the covers g, provided with perforations h h to admit air to the interior in order to allow the lubricant to feed down to the bearings. I

The central openings (Z in each bearing-box E are formed of such shape as to receive a bearing-block of lignum-dtae i, which is a rectangular block, and which, with its semicircular groove corresponding to the remain ing semicircular portion of the opening not filled by the bearing forms a circular opening or recess for the journal. Each opening or recess cl extends nearly through the bearingboX, but allows the bearing-block of lignumvitze and the journal to come in contact with theback wall of the recess. Extending through the back Wall of the recess in each box is a small opening Z, disclosing a portion of the journal and its bearing, and especially the contact of the journal with the bearing, so that the lubricant after being used will be discharged through the opening Z. \Vhile serving this purpose the opening is also designed for facilitating the removal of the bearing when it becomes worn, which is accomplished with great ease by removing the bearing-box from the brackets, if necessary, and driving out the bearing by inserting a punch through the opening Z.

Each bracket F is provided with the two upright supports I-I, each of which is provided with the curved recess or slot on to form the bearings for the trunnions a a. Each bearing-box being supported only upon the trunnions to allow the box afree movementin the direction of the shafts length, they will ac commodate themselves to the journals and give a uniform bearing-surface by the uniformity of contact which becomes necessary to better keep the oil on the bearings and prevent friction on any one part more than on another, which would result in wearing the bearing-surfaces irregularly.

" What I claim is l A device for supporting a cable-carrier shaft,consistingof the bearing-boxes provided with oil-cups and having trunnions formed thereon, in combination with suitable brackets on which said trunnions bear, said brackets being provided with recesses orslots adapted to receive the trunnions, substantially as described, whereby the trunnions will permit the hearings to accommodate themselves to the shaft, as and for the purpose set forth.

2. A device for supporting a cable-carrier shaft,consisting of the bearing-boxes provided with oil-cups and with trunnions, in combination with brackets on which said trunnions rest, the said bearing-boxes being each provided with recesses adapted to receive a lighum-vitae bearing and the end of the shaft, and having an opening through its back wall, substantially as described,and for the purpose set forth.

In testimony whereof I affix my signature in the presence of two subscribing witnesses.

I GEORGE ST. PIERRE.

Witnesses:

THOMAS H. PARRY, DANIEL CRoNIN. 

